sit still for

"Just being able to sit still for long enough in an exam... it's a real distraction when you're trying to perform at your best," she added.

But imaging black holes in polarized light isn't as easy as putting on a pair of polarized sunglasses, and this is particularly true of Sgr A*, which is changing so fast that it doesn't sit still for pictures.

And he’d already had to sit still for too much of the day.

Plus, every shower means seeing his imperfect naked body in the mirror, followed by having to sit still for hours to restore his elaborate hair and make-up.

This included children being able to sit still for long periods of time, infrequently losing their temper and having a good attention span, as reported by parents in questionnaires.